Rotary tillage, sowing, ditching and pressing compound operation machine

Abstract

A rotary tillage, sowing, ditching and pressing compound operation machine includes a fertilization and sowing device, an intermediate rotary tillage and ditching device, a frame, a liftable ditcher, and a multi-stage press wheel device. The multi-stage press wheel device includes a front press wheel and a rear press wheel. The front press wheel includes a front press roller shaft, front press rollers, and connecting rods. The rear press wheel includes a connecting plate, a rear press roller shaft, and a rear press roller. A first end of the connecting plate is connected to the rear press roller shaft by a support, and the connecting plate is connected to the frame in a manner of a sliding pair. The rear press roller is mounted on the rear press roller shaft in a manner of a revolving pair, and the rear press roller is located behind the liftable ditcher.

What is claimed is: 
     
       1. A rotary tillage, sowing, ditching and pressing compound operation machine, comprising a fertilization and sowing device, an intermediate rotary tillage and ditching device, and a frame, wherein the intermediate rotary tillage and ditching device is mounted at a lower part of the frame, and the fertilization and sowing device connected to the frame is arranged above the intermediate rotary tillage and ditching device; and further comprising a liftable ditcher and a multi-stage press wheel device, wherein the liftable ditcher is mounted behind ditching rotary tillage blades of the intermediate rotary tillage and ditching device to perform a ditching operation in cooperation with the ditching rotary tillage blades;
 the intermediate rotary tillage and ditching device comprises a rotary tillage blade shaft, an intermediate ditching cutter head, the ditching rotary tillage blades, and a plurality of sets of rotary tillage blades; the rotary tillage blade shaft is horizontally mounted on the frame, the intermediate ditching cutter head rotating synchronously with the rotary tillage blade shaft is fixed at a middle position on the rotary tillage blade shaft, and the ditching rotary tillage blades are respectively fixed on two sides of the intermediate ditching cutter head; the plurality of sets of rotary tillage blades are arranged on the rotary tillage blade shaft; 
 the multi-stage press wheel device comprises a front press wheel and a rear press wheel, and the front press wheel comprises a front press roller shaft, front press rollers, and connecting rods; the front press rollers are respectively mounted on two sides of the front press roller shaft each in a manner of a revolving pair, two ends of the front press roller shaft are respectively sheathed in first ends of the connecting rods, and second ends of the connecting rods are hingedly connected to the frame; the front press rollers are located behind the rotary tillage blades of the intermediate rotary tillage and ditching device; 
 the rear press wheel comprises a connecting plate, a rear press roller shaft, and a rear press roller; a first end of the connecting plate is connected to the rear press roller shaft by a support, and the connecting plate is connected to the frame in a manner of a sliding pair; the rear press roller is mounted on the rear press roller shaft in a manner of a revolving pair, and the rear press roller is located behind the liftable ditcher; and a second end of the connecting plate is connected to the liftable ditcher to achieve a switching of operation states of the liftable ditcher and the rear press wheel. 
 
     
     
       2. The rotary tillage, sowing, ditching and pressing compound operation machine according to  claim 1 , wherein a sliding groove is arranged in a middle of the connecting plate, a sliding groove guide column is arranged on the frame, the sliding groove guide column is located in the sliding groove, and a movement of the connecting plate and the frame in the manner of the sliding pair is enabled by an operation of the liftable ditcher. 
     
     
       3. The rotary tillage, sowing, ditching and pressing compound operation machine according to  claim 1 , wherein the support comprises two vertical connecting rods and a cross beam, two ends of the rear press roller shaft are respectively connected to first ends of the two vertical connecting rods, second ends of the two vertical connecting rods are connected by the cross beam, and the cross beam is connected to the connecting plate. 
     
     
       4. The rotary tillage, sowing, ditching and pressing compound operation machine according to  claim 1 , wherein the liftable ditcher comprises a ditching shovel, a connecting rod mechanism, and a driving mechanism, wherein the ditching shovel is connected to the driving mechanism through the connecting rod mechanism, a hinge point of the connecting rod mechanism is connected to the second end of the connecting plate, and operation states of the ditching shovel and the rear press wheel are switched synchronously through the driving mechanism. 
     
     
       5. The rotary tillage, sowing, ditching and pressing compound operation machine according to  claim 4 , wherein when the driving mechanism drives, through the connecting rod mechanism, the ditching shovel into a ditching operation state, the connecting rod mechanism drives, through the connecting plate, the rear press wheel into a non-operating state; and when the driving mechanism drives, through the connecting rod mechanism, the ditching shovel into a non-operating state, the connecting rod mechanism drives, through the connecting plate, the rear press wheel into a pressing operation state. 
     
     
       6. The rotary tillage, sowing, ditching and pressing compound operation machine according to  claim 1 , wherein a vertical rod is mounted between each of the connecting rods and the frame, and a compression spring is sleeved on the vertical rod.